Stop-motion.



No. 864,849. PATENTED SEPT. 3, 190.7;

G. H. LANG. l

STOP MOTION. APPLICATION FILED 0GT.26. 1906.

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No. 864,849. PATENTED SEPT. 3, 1907.

G. H. LANG.

STOP MOTION.

APPLIOATION FILED OGT.26.1906.

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param? onnion.

GEORGE H. LANG, OF BOSTON, MASSACHUSETTS.

STOP-MOTION.

Specification of Letters Patent- Patented Sept. 3, 1907.

Application filed October 26,1906. Serial No. 340,629.

To all whom il, may concern:

Be it known that l, Geenen H. LANG7 a citizen of the United States, and a resident ol Boston, in the lcounty of Suffolk and State ol lvlassachusetts, have invented an Improvement in Stop-Motions, of which the following description, in connection withthe accompanying drawing, a specilication, like letters on the drawing represe nting like parts.

The object of the present invention is to provide a novel stop motion which can be used with a machine to stop the latter and bring it to rest at a predetermined point in the cycle oi operations.

The invention is herein illustrated as used in connection with a numbering machine in which the numben ing mechanism is carried by a vibrating arm, and in which the mechanism lor vibrating said arm includes a friction clutch.

The stop motion is so arranged that at a suitable interval before the mechanism is to be brought to rest the clutch will be thrown out oi engagement, the parts continuing in operation through 'momentum until the desired predetermined point has been reached when said stop motion acts to positively bring said mechanism to rest.

One embodiment oi the invention will first be described and then the novel features thereof will be pointed out in the claims.

Tn the drawings, Figure l. is a vertical section through a nu mbering machine having my improved stop motion applied thereto; Fig. 2 is a section on substantially the line .fr-1r, Fig. l Fig. 3 is a detail hereinafter relerred to.

The numbering machine in`connectiori with which my invention is herein illustrated comprises a bed or base piece 3 on which is pivoted a vibrating arm 4:, which arm carries at one end a numbering head designated generally by 5. This head carries the numbering mechanism et any suitable construction, but which is not herein shown as it forms no part of my present invention.

The material 'to be numbered is placed on a rest o1' pad o, and the arm t vibrated to bring the numbering head against the material supported by the platen or rest G. The arm l is given its vibration by means of an actuating member 7, herein shown as a Crank disk mounted upon a suitaliile shaft S carried by the frame. rhis crank disk 7 has extending therefrom a crank pin 9 to which is connected one end oi a link or pitman l0, the

other end of said link being pivoted to the extended end oi the vibratin g arm 4;, as at 1l.

The shalt 8 may be driven in any suitable way, and is herein shown as having fast thereon a gear l2 which meshes with and is driven by a pinion 13 iast on the driving shalt lll.

Splined to the driving shaft 14 is one member l5 of a friction clutch, the other member f1.6 of which is carried by the driving pulley 17 that is loosely mounted on the shaft 14.

In the machine herein shownit is desirable to provide i'or stopping the movement oi the actuating member 7 when the arm 4: is raised, as shown in FigA l7 and the means l have herein shown for doing this is so constructed that when the friction clutch is thrown into engagement said means will hold the clutch in engagement until the crank disk 7 has made nearly a complete revolution, when said means will permit the clutch to be disengaged and will then bring the parts to .rest at a predetermined pointi For actuating the clutch a rock shalt 1S is provided which has tast thereto a forked arm 19 that engages the clutch member l5 and has also extending therefrom another arm 20 to which is connected a link 2]A leading to a suitable treadle or other manually manipulated device. When the treadle is depressed to draw downward on the link 2l. the rock shaft 18 will be turned to throw the clutch members into engagement thereby to set the mechanism in operation. For maintaining the clutch in operation the desired length of time and then for discontinuing it at the proper point I have provided a stop member 22, shown as a lever pivoted to the frame, as at 23, and having at one end a nose 24 to bear against the periphery of the crank disk 7 and having its other end connected by a link or thrust member 25 to an arm 2G extending i'rom the rock shaft 18.

The periphery or' the disk 7 is concentric. or circular' for the greater portion ol' its length but for a short distance, as for instance between the points'o and b itis eccentric, and at the pointe it has a shoulder 27. The stop member 20 is acted upon by a suitable spring 28 which tends to keep the nose 24 thereof in engagement with the disk 7 In the operation of the machine the operator starts the mechanism by depressing a treadle,` as above described, thereby throwing the clutch members into engagement. The rocking of the rock-shaft 1S necessary to cause the clutch members to be thrown into engage ment acts through the arm 2G and strut or thrust member 25 to turn the stop member 22 about its pivot suriiciently to disengage the nose 24 from the shoulder 27. The actuating member 7 is thus unlocked simultaneously with the throwing oi the clutch into engagement. As soon as the clutch is `in engagement the disk 7 is turned in the direction oi the arrow c, Fig. l, and oi course the machine will continue in operation as long as the treadle is held in its depressed position. Whenever it is desired to stop the machine however the treadle is released, and when this is done the spring 28 throws the nose 24 into engagement with the periphery of the disk 7. The size oi the concentric portion of said disk is such that so long as the nose 24 is in engagement therewith the clutch is held in engagement so that the concentric portion of the disk acts as a means tor maintaining the clutch in engagement. When the crank disk 7 has reached such a point in its rotation that the eccentric portion ot' the periphery is engaged by the nose 24 the rock shalt IS is permitted to turn sulhciently to permit the clutch to be disengaged. Owing to the momen tum oi the parts however the crank disk and the vibrating arm 4 will continue their nievement, although with a progressively decreased speed, until the nose 2li brings up against the shoulder 27 when the movement will be arrested.

The length oi the eccentric portion of the periphery ol the disk is such thatthe friction oi' the parts will very nearly bring them to rest belore they are positively stopped by the nose 24, and thus the positive stopping is efl'ected without any material jar or vibration. I have also provided means tor locking the crank disk (i from backward rotation aiter it has been brought to rest, and in the present embodiment oi my invention this is accomplished by providing said disk with a notch 32 adjacent the shoulder 27 into which the nose 24 is thrown by the action ot' the spring 28 when the disk has been brought to rest. This notch locks the disk irom backward rotation and prevents any rebound.

The l'orm ol` the stop member herein shown is capable oi' use with various machines having a vibrating arm, and I wish it understood that the invention is not limited in its application to a numbering machine such as herein shown. Furthermore, I would state that while the embodiment of the invention herein shown is the preferred embodiment, and has, therefore, been selected to illustrate the invention yet said invention is not limited to the construction illustrated.

Having described my invention what I claim as new and desire to secure by Letters Patent is 1. In a stop motion, a vibrating arm, a crank disk to actuate said arm, a clutch for driving the crank disk, means tending normally to disengage said clutch, and means acted upon by said disk to maintain the clutch in engagement.

2. In a stop motion, a vibrating arm, a crank disk to actuate said arm, a clutch for driving the crank disk, means having continuous engagement with the disk to maintain the clutch in engagement, and means for disengaging the clutch.

Il. In a device of the class described, a vibratingl arm, a crank-disk to actuate it, a clutch for driving the crank disk, and means acted On continuously by the disk to maintain thc clutch in engagement.

y-l. In a stop motion, a vibrating arm, a crank disk connected thereto, a clutch independent of said crank disk for driving the latter and means to maintain the clutch in engagement during a predetermined length of time.

In a stop motion, a vibrating arm, a crank disk connected thereto, a clutch for driving the crank disk, a spring to disengage the clutch, and disk-controlled means to maintain the clutch in engagement during a predetermined length oi time.

6. In a device of the class described, a crank disk, a clutch for operating said disk, a rockshatt for actuating the clutch, means acted on b v the disk to maintain the clutch in engagement, and means to disengage the clutch when released by the disk.

T. In a stop motion, an actuating member having a cam surface, a clutch for actuating' said member, a roc shaft for operating the clutch, a member connected to the rockshaft and bearing against the cam surlace and acting to maintain the clutch in engagement, and automaticallyoperative means to disengage the clutch when such action is permitted by the cani surface.

S. In a device oi the class described, a rotary member having a cam surface provided with a high portion and a low portion, a clutch for driving said member, a roekshaft for operating the clutch, a member connected to the rock-shaft and bearingl against said cam surface, said member operating to maintain the clutch in engagement when it bears against the high portion of the cam, and automatically-operative means to disongage the clutch when said member bears against the low portion of the cam surface.

9. In a device of the class described, a vibrating arm, a crank disk to actuate it, said disk having a stop shoulder, a clutch for driving the crank disk, and disk-controlled means to maintain the clutch in operation, and means to disengage the clutch, said disk-controlled means coacting with the stop shoulder to stop the crank disk after the clutch has been disengaged.

10. In a stop lnotion, a vibrating arm, a crank disk to actuate said arm, said crankdisk having a portion of its periphery concentric and a portion eccentric and also having Aa stop shoulder, a clutch for driving said disk, clutch actuatingl mechanism, and a stop member connected to the clutch-actuating mechanism and provided with a nose yieldingly held against the periphery of the disk.

l1. In a device of the class describd, a rotary actuating disk member having a portion of its periphery concen tric and the remainder eccentric and also having a stop shoulder, a clutch for driving said member, a rock shaft for operating the clutch, and a spring pressed stop member connected to the rock shaft and engaging the periphery of the disk, the latter having a locking notch adjacent the shoulder with which the stop member engages when the disk is brought to rest.

12. In a stop mechanism, a vibrating arm, a crank disk to actuate said arm, a clutch for driving the crank disk, and means controlled by the disk to govern the operation of the clutch and to lock said disk from backward rotation after the disk has been brought to rest In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

a GEORGE II. LANG.

Witnesses z Louis C. SMITH, MARGARET A. DUNN. 

